* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

a {
  text-decoration: none;
  color: inherit;
}

.nav {
  padding: 20px;
  border: 1px solid #ccc;
  border-radius: 5px;
  line-height: 3;
  color: #333;
  width: 500px;
  margin: 30px auto;
}
.nav a {
  display: block;
}
.nav span {
  display: inline-block;
  background: #eee;
  border-radius: 50%;
  width: 25px;
  height: 25px;
  line-height: 25px;
  text-align: center;
  color: #fff;
}

